<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
//行元素（标签里的内容单独占一行）后期会被div取代
<p></p>
<h1></h1>
//输入元素
<input

    
</body>
</html>